Method of rolling plate and like metal and blank therefor



Au 14, 1923. v 1 RA-64.92% B. GOLDSMITH METHOD OF ROLLING PLATE AND LIKEMETAL AND BLANK THEREFOR Filed May 51. 1921 K OLD FORM 1 Fin. 2.

OLD FORM WITNESSESS INVENTOR WQJZM. W;

ATTORNEYS Patented Aug. 14, 1923.

UNITED STATES l nen rrica.

BERTHOLD GOLDSMITH, 0F LISBON, OHIO, ASSIGNOR TO THE NATIONAL BRASS &'COPPER COMPANY, OF LISBON, OHIO, A CORPORATION OF OHIO.

METHOD OF ROLLING PLATE AND LIKE METAL AND BLANK THEREFOR.

Application filed May 31,

To all whom it may concern Be it known that I, BERTHOLD GOLDSMITH, acitizen of the pnited States, and a resident of Lisbon in the county ofGolumbiana and State of Ohio, have invented a new and useful Improvementin Methods of Rolling Plate and like Metal and Blank Therefor, of whichthe following is a'specification.

This invention relates to a method of producing plate, sheet, strip, andcoil metal, and particularly from the non-ferrous metals, and to a blanktherefor.

The object is to provide a method for producing products of the kindabovedefined, withaminimum amount of scrap loss due to the irregularnon-rectilinear edges of the plate, sheet, or strip.

According to existing methods of producing plate, sheet, strip, and coilmetal, a bloom, slab, ingot, bar, or billet, or other blank ofrectilinear form, that is to say with square ends and parallel sideedges, is suitably heated and then rolled repeatedly, until reduced tothe desired gage. In the rolling of such blanks, particularly ofnon-ferrous metals, the plate, sheet, or strip produced thereby ismaterially distorted at its sides and ends, which makes it necessary totrim oil and reject a considerable amount of metal in order to produce acommercial product having square ends and parallel sides.

According to the present invention the method of producing such metal ismodified so as to reduce to a minimum the amount of metal which must betrimmed off and rejected.

In the accompanying drawing, Fig. 1 is a plan view of a typical blankmade according to existing methods of producing metals of the kindspecified; Fig. 2 is a plan view of the same when rolled out; Fig. 3 isa plan view of the form of blank according to the new method; and Fig. 4is a plan view of the same when rolled out.

According to the present methods of producing plate, sheet, strip, andcoil metal, particularly with non-ferrous metal, a blank is producedsuch as shown in Fig. 1, that is to say a blank of rectilinear design,having square ends 1 and parallel sides 2, as shown. One end may betapered slightly to facilitate entering the rolls in the roughing pass.This blank is suitably heated and then is rolled, a number of times,until reduced to the de- 1921. Serial N0. 473,749.

sired gage. The rolling distorts the blank causlng the ends to bulge outmore or less irregularly, and causing the finished plate, sheet, strip,or coil metal to be widest at its ends 1 and narrowest intermediate itsends. As a consequence material amounts of metal must be trimmed of]?and rejected, in order to produce a commercial product with square endsand parallel sides.

According to the present invention the blank is formed suitably varyingin shape from a rectilinear design so that when heated and rolled in theordinary manner the distortion produced by the repeated rolling causesthe non-rectilinear blank to assume a final shape having approximatelysquare ends and parallel sides. A suitable form of blank for thispurpose is shown in Fig. 3, the same having indented or concave ends 3,and bulged out or convexside edges 4. When such a blank is heated androlled repeatedly, the ends 3 assume a substantially square outline, andthe edges 4* assume substantially straight and parallel sides, as shownin Fig. 4. Consequently the plate, sheet, strip, or coil metal can beconverted to a commercial product having parallel sides and square ends,with a minimum amount of metal to be trimmed ofi, thus resulting in avery considerable saving.

The amount of distortion of the blank from the rectilinear form willvary with the kind of metal, and the amount-0f reduction to be given toit. The larger the number of passes the greater generally is thedistortion in rolling, and consequently for producing very thinproducts, requiring a large number of passes or a large amount ofreduction, the blank will be given an initial dis. tortion fromrectilinear to a greater extent than where a smaller number of passes ora lesser amount of reduction is required to roll down to gage.

The blank can obviously be of any size and thickness. depending upon theproduct to be produced, and can be formed in any suitable way. and inthe case of non-ferrous metals may be conveniently formed by casting.thereby producing a blank having the required amount of distortion.without loss of metal.

The method described adds nothin to the cost of producing the metal ande cots a Very material saving in scrap. as will be obvious.

I claim:

1. The method of producing plate, sheet, strip or coil metal with aminimum scrap loss, consisting in forming a blank having convex orbulged side edges, heating said blank, and reducing it by rolling,whereby the distortion produced in rolling causes the non-rectilinearblank to approach a substantially rectilinear shape. t

2. The method of producing plate, sheet, strip or coil metal with aminimumscrap loss, consisting in forming a blank with concave ends andconvex or bulged side edges, heating said blank, and rolling the saidblank repeatedly to form it into a plate, sheet, strip or coil metalwith substantially square ends and substantially parallel sides.

3. A blank for rolling into plate, sheet. strip or coil metal, saidblank having convex or bulged side edges, whereby when rolled it assumesa form which approximates square ends and parallel sides.

4. A blank for rolling into plate, sheet, strip or coil metal, providedwith concave ends and convex or bulging side edges, whereby when thesame is rolled the ends become substantially square and the side edgesbecome substantially parallel.

5. The method of producing plate, sheet, strip or coil metal with aminimum scrap loss, consisting in forming a blank with concave ends,heating said blank and rolling it repeatedly to form it into a plate,sheet, strip or coil metal with substantially square ends and parallelsides.

'6. A blank for rolling into plate, sheet, strip or coil metal, providedwith concave ends, whereby when the same is rolled the ends becomesubstantially square.

In testimony whereof, sign my name.

BERTHOLD GOLDSMITH.

Witnesses:

J. L. GOLDSMITH, W. GOLDSMITH.

